Pen portrait sketch

Today i decided to draw a ball point pen sketch. Because its been quite a while since i drew with pen and also i need to draw with pen so i can color them digitally.
So i decided to draw this portrait that had some crazy lighting and so i tried to use different color pens for that, but now i realize that it was a huge mistake.
This does not look like what i had in mind.

Reference image used for this drawing